crenellate -- Isabella

crenellate US, crenelate [ˈkrɛnɪˌleɪt]

vb (tr)

1. (Military / Fortifications) to supply with battlements

2. (Fine Arts & Visual Arts / Architecture) to form square indentations in (a moulding, etc.)

[from Old French creneler, from crenel]

crenellation US, crenelation n

Collins English Dictionary – Complete and Unabridged © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003

I wonder if Isabella's boarding school is fancy, with crenellations on the building's exteriors.